When a DR Vault Server becomes an active vault, it will automatically fail back to the original state once the Primary Vault comes back online.
When a DR Vault Server becomes an active vault, it will automatically fail back to the original state once the Primary Vault comes back online.
A DR Vault Server does not automatically fail back to its original state once the Primary Vault comes back online. Automatic failback is not a feature supported by the system, thus making it impossible for such behavior to occur.
Correct is B. Reference: https://docs.cyberark.com/Product-Doc/OnlineHelp/PAS/Latest/en/Content/PASIMP/Initiating-DR-Failback-to-Production-Vault.htm
AllowFailback does not even exist in PADR.ini (or anywhere else) https://docs.cyberark.com/Product-Doc/OnlineHelp/PAS/Latest/en/Content/PASREF/Disaster%20Recovery%20Vault%20Parameter%20File.htm
B is correct answer.